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Investigation on the Dynamic Behavior of Rock in Three Stages of Rock Fragmentation Under Vibro‐Impact Condition: Continuum and Discontinuum Model.

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Title: Investigation on the Dynamic Behavior of Rock in Three Stages of Rock Fragmentation Under Vibro‐Impact Condition: Continuum and Discontinuum Model.
Authors: Zhang, Zhao1 (AUTHOR), Gu, Zewen1 (AUTHOR), Liu, Jianlin1 (AUTHOR) liujianlin@upc.edu.cn, Gao, Meng1 (AUTHOR) gmxyz@sdust.edu.cn
Source: Advances in Civil Engineering. 8/17/2025, Vol. 2025, p1-13. 13p.
Subjects: Resonance effect, Rock mechanics, Frequencies of oscillating systems, Statistical models, Solid mechanics, Crack propagation, Transients (Dynamics)
Abstract: Understanding the effects of harmonic excitation on rock failure is essential in terms of enhancing rock‐breaking efficiency. Although a series of dynamic cracking have been studied, investigations on the dynamic behavior of rock in different stages of rock fragmentation under practical vibro‐impact drilling conditions are limited. In the present work, the continuum model and discontinuum model are proposed, respectively, which can be used to explore the influences of elastic waves and resonance effect in different stages. First, before rock fragmentation, damping effect on the attenuation of waves in continuum rock is investigated, where the parameters N and Nd are proposed to reflect the sustainability of dynamic influence of waves within the effective propagation distance α−1. Subsequently, in the early stage of rock fragmentation, the number and morphology of crack propagation under different excitation frequencies, penetration depths are obtained by using discrete element method (DEM). Next, in the late stage of rock fragmentation when the rock is regarded as a discontinuum separated by structural surfaces, the low‐frequency resonance effect on rock breaking is studied based on a system with great stiffness disparity (SGSD). The theoretical results are verified by the experimental results based on the practical drilling with a multidimensional impactor. The results show that the dynamic influence of high or low excitation frequencies on rock fracture is quite different. The impact of excitation frequencies plays an important role in early and late stages of rock fragmentation to improve the rock‐breaking efficiency. These findings contribute to a better understanding of the rock breaking mechanism under dynamic loads with certain excitation frequencies. [ABSTRACT FROM AUTHOR]
Copyright of Advances in Civil Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Investigation on the Dynamic Behavior of Rock in Three Stages of Rock Fragmentation Under Vibro‐Impact Condition: Continuum and Discontinuum Model.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Zhao%22">Zhang, Zhao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gu%2C+Zewen%22">Gu, Zewen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Jianlin%22">Liu, Jianlin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> liujianlin@upc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Gao%2C+Meng%22">Gao, Meng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gmxyz@sdust.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Advances+in+Civil+Engineering%22">Advances in Civil Engineering</searchLink>. 8/17/2025, Vol. 2025, p1-13. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Resonance+effect%22">Resonance effect</searchLink><br /><searchLink fieldCode="DE" term="%22Rock+mechanics%22">Rock mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Frequencies+of+oscillating+systems%22">Frequencies of oscillating systems</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+models%22">Statistical models</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+mechanics%22">Solid mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Crack+propagation%22">Crack propagation</searchLink><br /><searchLink fieldCode="DE" term="%22Transients+%28Dynamics%29%22">Transients (Dynamics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Understanding the effects of harmonic excitation on rock failure is essential in terms of enhancing rock‐breaking efficiency. Although a series of dynamic cracking have been studied, investigations on the dynamic behavior of rock in different stages of rock fragmentation under practical vibro‐impact drilling conditions are limited. In the present work, the continuum model and discontinuum model are proposed, respectively, which can be used to explore the influences of elastic waves and resonance effect in different stages. First, before rock fragmentation, damping effect on the attenuation of waves in continuum rock is investigated, where the parameters N and Nd are proposed to reflect the sustainability of dynamic influence of waves within the effective propagation distance α−1. Subsequently, in the early stage of rock fragmentation, the number and morphology of crack propagation under different excitation frequencies, penetration depths are obtained by using discrete element method (DEM). Next, in the late stage of rock fragmentation when the rock is regarded as a discontinuum separated by structural surfaces, the low‐frequency resonance effect on rock breaking is studied based on a system with great stiffness disparity (SGSD). The theoretical results are verified by the experimental results based on the practical drilling with a multidimensional impactor. The results show that the dynamic influence of high or low excitation frequencies on rock fracture is quite different. The impact of excitation frequencies plays an important role in early and late stages of rock fragmentation to improve the rock‐breaking efficiency. These findings contribute to a better understanding of the rock breaking mechanism under dynamic loads with certain excitation frequencies. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Advances in Civil Engineering is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1155/adce/8789655
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      – Code: eng
        Text: English
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        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Resonance effect
        Type: general
      – SubjectFull: Rock mechanics
        Type: general
      – SubjectFull: Frequencies of oscillating systems
        Type: general
      – SubjectFull: Statistical models
        Type: general
      – SubjectFull: Solid mechanics
        Type: general
      – SubjectFull: Crack propagation
        Type: general
      – SubjectFull: Transients (Dynamics)
        Type: general
    Titles:
      – TitleFull: Investigation on the Dynamic Behavior of Rock in Three Stages of Rock Fragmentation Under Vibro‐Impact Condition: Continuum and Discontinuum Model.
        Type: main
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          Name:
            NameFull: Zhang, Zhao
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            NameFull: Gu, Zewen
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            NameFull: Liu, Jianlin
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            NameFull: Gao, Meng
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            – D: 17
              M: 08
              Text: 8/17/2025
              Type: published
              Y: 2025
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              Value: 2025
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            – TitleFull: Advances in Civil Engineering
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